| 摘要 |
<p>PCT No. PCT/GB86/00394 Sec. 371 Date Feb. 17, 1987 Sec. 102(e) Date Feb. 17, 1987 PCT Filed Jul. 9, 1986 PCT Pub. No. WO87/00233 PCT Pub. Date Jan. 15, 1987.A lock has means (15,16) for reading from a key (11) a binary encoded number. If the number read from the key is a predetermined number, the lock will store in a memory (19) a further number read from a further key applied immediately after withdrawal of the first key. The device will then recognize the second key, when applied subsequently.</p> |
